Best Current Probe for Multimeters and Oscilloscopes: 7 Picks Compared

As an Amazon Associate, bestmultimeter2020.com earns from qualifying purchases made through the links on this page. If you need to measure current without breaking the circuit, a current probe is the tool to reach for. A current probe, sometimes called a clamp-on current probe or current clamp, lets you read the current flowing through a single conductor by placing its jaws around the wire. Most people buy one for one of two jobs: to add current measurement to a digital multimeter, or to see a current waveform on an oscilloscope. Those two jobs call for slightly different probes, and the wrong choice can leave you with a reading you cannot trust.

This guide covers seven current probes and clamp-on current meters drawn from our product research, including three Fluke models, two Hantek clamps, a Micsig-branded oscilloscope probe, and an OWON current probe. For each one we list the specifications that appear in its Amazon listing data, and we flag anything the listing leaves out. We explain how current probes work, what the main specifications mean, and which type suits which job. Where a claim about how these instruments work comes from an outside source, we name it.

Quick answer

For oscilloscope waveform work, the Micsig CP2100B has the highest stated bandwidth in this list. For multimeter current readings on bench or service work, the Hantek CC-65 covers 20 mA to 65 A DC. For large cables in tight spaces, the Fluke i2500-18 iFlex flexible probe is the better fit. The sections below explain the reasons and the gaps in each listing.

How we chose these seven

We started from the current probe and clamp-on current meter entries in our research set for this keyword. We kept products that measure current directly, and we set aside items that are mainly voltage or continuity testers without a current function. For each kept product we read the specifications and bullet points in its listing data. We used only those stated figures and marked any gap as unverified. We checked the working principle against three Fluke Learn articles, listed at the end of this guide.

How a current probe works

Current probes use one of two sensing methods, and understanding the difference helps you read any specification sheet correctly.

The first method is the current transformer. According to Fluke Learn, AC-only clamps have rigid ferrite iron cores wrapped with copper coils. The conductor inside the jaws acts as a single primary turn, and the coils act as the secondary winding. The alternating current in the conductor creates a magnetic field that the iron core concentrates, which induces a current in the meter’s secondary coils. Because the secondary current is scaled down by the turns ratio, a current transformer clamp produces a small output that the meter converts into a reading. Fluke’s own example uses 1000 secondary windings, so 1 A in the conductor produces 0.001 A, or 1 mA, at the meter input. Fluke also states that current transformer clamp meters “only respond to ac waveforms,” because a steady DC current produces no changing field to induce a signal in the coils.

The second method is the Hall effect sensor. Fluke Learn describes Hall effect clamp meters as able to measure both AC and DC current, with a stated frequency range up to the kilohertz range (1000 Hz). The jaws have no copper windings. Instead, the field is focused across a small air gap where the jaw tips meet, and a semiconductor sensor sits in that gap. The sensor outputs a voltage proportional to the magnetic flux, which the meter amplifies and scales to show the current. The air gap keeps the iron core from saturating. Fluke also notes that Earth’s DC magnetic field and nearby magnetic sources can cause offsets, so the meter should be zeroed before a DC measurement.

This split explains most of what you will see in a product listing. Probes marketed as AC/DC for oscilloscopes often use a Hall effect or similar sensor. Probes marketed as AC-only are usually current transformers. When a listing does not say which method it uses, treat the AC/DC claim with some caution until you can confirm it from the manufacturer’s documentation.

Specifications that matter when you choose

Current range. This is the span of current the probe can measure. Some probes list a small range, such as 10 A or 100 A, with a separate setting for each. Others list a much larger range, such as 20 mA to 650 A. A wide range is useful, but a probe that stretches to 650 A usually gives less resolution at the bottom of its range than a probe designed for milliamp work. Match the range to the circuit you will test, not to the biggest number on the box.

Frequency range or bandwidth. This tells you how fast a changing current the probe can follow. It matters most for oscilloscope work, where you may be looking at switching waveforms, motor drive signals or power supply ripple. A probe with a bandwidth in the megahertz range can show fast edges that a 400 Hz or 20 kHz probe will smooth out. For a clamp meter reading the current in a mains circuit, a much lower frequency range is normally enough.

Output and compatibility. Oscilloscope current probes usually have a BNC output and a stated sensitivity, such as volts per amp. Clamp-on meters for multimeters usually output a signal in millivolts per amp, or they display the reading directly. Check that the output connector and the sensitivity match your instrument before you buy.

Conductor size. The maximum conductor diameter sets which wires fit inside the jaws. A probe with a 9 mm maximum opening will not take a thick cable, and a flexible probe can reach bundles that a rigid jaw cannot.

Safety rating. Some listings give a CAT category and voltage rating. Those ratings describe where the probe can be safely used on live circuits. We include a rating only where the listing data states it. Where a listing gives none, we say so.

Power source. Battery-powered probes are common for clamp meters. Some oscilloscope probes take USB or 5 V DC power. Note the battery type and whether the probe includes a low-battery indicator.

The 7 current probes compared

1. Fluke i2500-18 iFlex flexible current probe

The Fluke iFlex i2500-18 is a flexible current probe that expands a compatible Fluke digital multimeter’s measurement range to 2500 A AC. Its listing states a 0.1 A resolution and an 18-inch size. Flexible probes are useful when a rigid jaw cannot reach the conductor, for example in a tight panel or on a large cable bundle. The listing describes a 7.5 mm coil diameter that allows measurement in tight spaces, and gives a safety rating of CAT IV 600 V and CAT III 1000 V. The listing also cites IEC 61010-1 and IEC 61326 as standards. Because it is a flexible coil, it is best suited to AC work. Fluke’s guidance for flexible probes says to keep the probe coupling more than 1 inch (2.5 cm) from the conductor and to center the conductor in the probe.

No buying link here: this model is not in our approved product list.

2. Fluke i400 AC current clamp

The Fluke i400 is an AC current clamp designed as a companion to a digital multimeter. Its listing states that it measures up to 200 A AC, gives a 1 mA per amp output, and lists a CAT III 600 V rating. It runs on alkaline batteries and weighs 477 g according to the listing. The 1 mA per amp output means a reading of 200 A appears as 200 mA on the meter input, which many multimeters can display with the right range. The listing does not state a frequency range or accuracy figure, so those items are unverified for this product. Because it is an AC current transformer, Fluke’s own description of AC clamps applies: it will not read DC.

Unlinked: this product is absent from our approved product list, so the page carries no buy link for it.

3. Fluke T5-1000 voltage, continuity and current tester

The Fluke T5-1000 combines an open-jaw current measurement with voltage and continuity testing. Its listing states that it measures AC and DC volts with digital resolution, includes a continuity beeper, and offers an open-jaw design for current measurements without metallic contact. Its listing gives a CSA and VDE mark, and it runs on alkaline batteries. The listing does not state a current range or a frequency range, so we cannot confirm those numbers from our data. This model is best for a technician who needs a single compact tool for basic voltage and continuity checks and occasional current readings, rather than a dedicated oscilloscope probe.

Linked: View on Amazon

4. Hantek CC-65 AC/DC current clamp

The Hantek CC-65 is a battery-powered AC/DC current clamp with a BNC output for oscilloscopes and multimeters. Its listing gives an effective measurement range of 20 mA to 65 A DC and states an AC/DC frequency range of up to 20 kHz. The maximum conductor diameter is 9 mm. It has a red LED low-battery indicator, uses a 9 V battery, and includes a 1 m output cable with a BNC connector. The listing gives a weight of 250 g and dimensions of 195 mm by 70 mm by 33 mm. It is a good fit for a hobbyist or service technician who wants both DC and AC readings at modest currents, with an oscilloscope output for waveform work. The listing does not state an accuracy figure or a sensitivity value, so those are unverified.

Linked: View on Amazon

5. Hantek CC-650 AC/DC current clamp meter

The Hantek CC-650 is a larger-range sibling of the CC-65. Its listing gives an effective measurement range of 20 mA to 650 A DC and states an AC/DC frequency range of up to 400 Hz. The maximum conductor diameter is 30 mm, which is much larger than the CC-65’s 9 mm opening. It uses a 9 V battery and lists a battery life of 100 hours typical with carbon-zinc cells. It has a 1 m BNC output cable and a red LED low-battery indicator. Its listing weight is 250 g and its dimensions match the CC-65. The 400 Hz frequency figure is the key limit: this probe is suited to power-frequency work such as mains and motor current, not to fast switching waveforms on an oscilloscope.

Linked: View on Amazon

6. Micsig CP2100B oscilloscope current probe (listed under XEAST)

The Micsig CP2100B is an AC/DC oscilloscope current probe. Its listing gives a bandwidth of DC to 2.5 MHz, a rise time of 140 ns or less, and two ranges: 10 A and 100 A. The output sensitivity is 0.1 V/A on the 10 A range and 0.01 V/A on the 100 A range. The listing gives a maximum measurable current of 100 Apk, 70.7 Arms for DC plus AC peak, and a DC accuracy of about 3 percent plus 50 mA on the 10 A range. The probe is powered by 5 V DC over USB and has a standard BNC interface. The listing also says it works with both oscilloscopes and multimeters. Its bandwidth figure makes it one of the stronger options in this list for waveform work, though the 2.5 MHz figure is a listing claim and we have not confirmed it against the manufacturer’s own datasheet. Note that the listing brand reads XEAST.

No link is shown for this model, since it sits outside our approved product list.

7. OWON CP024 AC/DC current probe for oscilloscopes

The OWON CP024 is an AC/DC current clamp probe with a BNC output, made for oscilloscopes with BNC inputs. Its listing describes a range covering 1 mA to 400 A, with a range selector on a slide switch on the probe handle. The listing names the ranges 4 A, 40 A, 200 A and 300 to 400 A. It is battery powered and weighs 0.32 kg. The listing gives dimensions of 8.66 by 4.13 by 1.89 inches. It does not state a bandwidth, accuracy or sensitivity figure, so those points are unverified. It is a practical choice for automotive or industrial current traces where you already have an oscilloscope, but you should confirm the bandwidth with OWON before relying on it for fast-edge work.

No buying link is included for this model because it is not in our approved product list.

Quick comparison

Model	Main use	Stated current range	Stated frequency or bandwidth	Output
Fluke i2500-18 iFlex	AC, flexible probe with Fluke DMMs	Up to 2500 A AC	Not stated	Works with Fluke DMM
Fluke i400	AC clamp with DMM	Up to 200 A AC	Not stated	1 mA per amp
Fluke T5-1000	Voltage, continuity and current	Not stated	Not stated	Open-jaw meter
Hantek CC-65	AC/DC clamp, scope or DMM	20 mA to 65 A DC	Up to 20 kHz	BNC
Hantek CC-650	AC/DC clamp, large conductors	20 mA to 650 A DC	Up to 400 Hz	BNC
Micsig CP2100B	AC/DC oscilloscope probe	10 A and 100 A ranges	DC to 2.5 MHz	BNC, 0.1 V/A and 0.01 V/A
OWON CP024	AC/DC probe for scopes	1 mA to 400 A (listing)	Not stated	BNC

Which current probe should you buy?

If your main job is oscilloscope waveform work, start with a probe that states a bandwidth in the megahertz range and a BNC output. The Micsig CP2100B is the strongest match on paper in this list, because its listing gives a 2.5 MHz bandwidth and two sensitivity settings. Confirm the figures with the maker before you rely on them for a critical measurement.

If you want a current reading on a multimeter, a clamp meter style is simpler. The Hantek CC-65 covers 20 mA to 65 A DC with a 9 mm jaw opening, which suits small wires and bench work. The Hantek CC-650 covers more current, up to 650 A DC, and a larger 30 mm opening, but its 400 Hz frequency figure makes it less suitable for fast signals.

If you need current on large cables, or in tight spaces where a rigid clamp will not fit, a flexible probe such as the Fluke i2500-18 is the better tool, but it works with Fluke multimeters and is designed for AC.

If you already own a Fluke multimeter and need a basic AC current reading, the Fluke i400 fits the workflow. Keep in mind that its listing gives no frequency or accuracy figure.

How to use a current probe safely and accurately

Fluke Learn’s clamp meter guidance gives a few steps that apply to most current clamps. First, set the meter to the correct function, AC or DC, and check that the jaws icon appears on the display. Second, for a DC reading, let the display stabilize and press zero with the jaws closed and no conductor inside. This removes DC offset. Third, open the jaws, insert the conductor, close the jaws, and center the conductor using the alignment marks. Fourth, clamp only one conductor at a time. Fluke notes that currents flowing in opposite directions cancel each other, so clamping both the live and neutral wires of a single-phase circuit will give a near-zero reading.

Fluke also advises against opening a clamp around live conductors unnecessarily. Follow the meter’s safety steps, keep your fingers behind the tactile barrier, and disconnect the test leads before clamping. For a flexible probe, Fluke recommends de-energizing the installation where possible, or wearing suitable protective clothing if the conductor is live. Keep the probe coupling more than 1 inch (2.5 cm) from the conductor.

The Fluke Learn guidance also notes that small AC currents can show a flashing dot in the jaws icon below 0.5 A. That indicator is a reminder that low-current readings are less reliable on a clamp, and a dedicated low-current clamp may serve better for that work.

Common mistakes buyers make

Buying an AC-only clamp for DC work. A current transformer clamp will not read DC, as Fluke’s description of AC clamps makes clear. If you need DC readings, choose a Hall effect or similar AC/DC design, and confirm that the listing says so.

Ignoring the frequency limit. A probe with a 400 Hz or 20 kHz limit can smooth out fast switching signals. For oscilloscope waveform work, check the bandwidth first.

Choosing by the largest current number. A probe that reads up to 650 A often gives less fine resolution than a probe built for smaller currents. Match the range to the circuit you will test.

Skipping the zero step on DC. Earth’s DC magnetic field and nearby magnetic sources can offset the reading. Zeroing with the jaws closed and no conductor inside corrects this.

Clamping two conductors. Opposite currents cancel each other inside the jaws. Clamp only one conductor at a time.

What we could not verify

Several specifications are missing from the listing data for some products. We have marked each gap in the product sections above. For the Fluke i400, the Fluke T5-1000, and the OWON CP024, the listing does not give a bandwidth or accuracy figure. For the Fluke iFlex, the listing gives a current range but no frequency figure. For the Micsig CP2100B, the 2.5 MHz bandwidth and the accuracy figures come from the listing, and we did not confirm them against a manufacturer datasheet. Before you buy a probe for a safety-critical or calibrated measurement, check the current manufacturer documentation for the exact model number.

Related guides on this site

If you are deciding between a clamp meter and a probe, read our guide to the best Fluke clamp meter for automotive work. For a general handheld meter that also reads current, see our best Extech multimeter roundup.

Frequently asked questions

Can a current probe measure DC?

It depends on the sensing method. Fluke Learn states that current transformer clamps respond only to AC waveforms. Hall effect clamps can measure both AC and DC. Check the listing for AC/DC wording and confirm the method with the maker.

Does a current probe need to be zeroed?

For DC readings, yes. Fluke recommends letting the display stabilize and pressing zero with the jaws closed and no conductor inside.

Why does the frequency range matter?

The frequency range limits how fast a changing current the probe can follow. A 400 Hz limit suits mains and motor current. Fast switching waveforms need a much higher bandwidth.

Can I clamp both wires of a circuit?

No. Opposite currents cancel inside the jaws, so clamp only one conductor at a time.

Sources

• Fluke Learn, “Inside Current Transformer (ac) Clamp Meters,” https://www.fluke.com/en-id/learn/blog/clamps/inside-current-transformer-ac-clamp-meters (opened 2026-10-28)
• Fluke Learn, “What are Hall Effect (ac, dc) clamp meters?,” https://www.fluke.com/en-us/learn/blog/clamps/inside-hall-effect-clamp-meters (opened 2026-10-28)
• Fluke Learn, “How to Measure Current with a Clamp Meter,” https://www.fluke.com/en/learn/blog/clamps/how-to-measure-current (opened 2026-10-28)

Final thoughts

The best current probe depends on the job. For oscilloscope waveforms, a probe with a megahertz-class bandwidth and a BNC output is the right starting point, and the Micsig CP2100B is the closest match among the seven. For multimeter current readings on bench or service work, the Hantek CC-65 and CC-650 cover a wide range of DC and AC currents at a modest price, but their frequency limits decide which one fits. For tight spaces or large cables, the Fluke iFlex is the flexible option. Match the range, bandwidth and output to your instrument, check the AC or DC design, and confirm the figures that matter most with the manufacturer before you rely on them.